Bulb for an electric lamp



FIG. 1 is a first perspective view of a bulb for an electric lamp showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is an enlarged view of the selected portion in FIG. 2. 

CLAIM The ornamental design for a bulb for an electric lamp, as shown and described. 